diff --git a/docutranslate/workflow/md_based_workflow.py b/docutranslate/workflow/md_based_workflow.py
index 3055652..8f5f03c 100644
--- a/docutranslate/workflow/md_based_workflow.py
+++ b/docutranslate/workflow/md_based_workflow.py
@@ -74,12 +74,12 @@ class MarkdownBasedWorkflow(Workflow[MarkdownBasedWorkflowConfig, Document, Mark
             converter = converter_class(convert_config)
         else:
             raise ValueError(f"不存在{convert_engin}解析引擎")
-        document_md = converter.convert(self.document_original)
+        document_md :Document= converter.convert(self.document_original)
         if hasattr(converter,"attachments"):
             for attachment in converter.attachments:
                 self.attachment.add_attachment(attachment)
-        # 获取缓存解析后文件
-        md_based_convert_cacher.cache_result(document_md, self.document_original, convert_engin, convert_config)
+        # 缓存解析后文件
+        md_based_convert_cacher.cache_result(document_md.copy(), self.document_original, convert_engin, convert_config)
 
         return document_md